I get just over a day with Direct Push, BT on, 3-4 calls, checking three other POP3 accounts and listening to music for around an hour and GPS on the way home.
Bottom line is that BT seems to hammer the device. HSDPA is switched on the Touch Plus's by default and you have to find a copy of HSDPASwitch.exe to disable it and that can also hammer the device.
There are tweaks on devs here that can help too.

Has anyone compared the Dual to other sliders?
My partner's Samsung G800 waggles more than the Dual and Samsung are experts in the slider market. I really think that people look for issues sometimes and us PDA geeks rarely use sliders so maybe this is normal for a slider?

I have to agree. WiFi isn't important (To me), I have a keychain BT GPS unit, bought a signal booster for £1 to up my signal at home and have applied the battery savings tweaks from XDA-Devs. It beats the Kaiser for me, although the Kaiser is still my work device.

The issue that I find is that 3 simply don't have the customer services/sales knowledge to make this sevrice work. I now have bought the £10 per month option on a business tarrif and it's far more difficult than it would be if I was a consumer. Technical services are an 0870 number and the data tracking software is pants.
Having said that, the service does work - but methinks it's ripe for a takeover.

Sound like the experience I have had, there's a slight waggle on the X-axis but apart from that it's rock solid. Have you tried installing Coreplayer 1.1.3 yet? I found that it speeds the device up a bit (Could be my imagination though!)

Well 4Winmobile have reviewed the Orbit 2 now. To me, it depends what you want/need. The Dual without a decent data package is a waste of time IMHO due to the lack of WiFi (Luckily I have decent data package). I'm now being cajoled into doing a review of the Touch Plus for 4Winmobile so will expect to have it done within the next two weeks. To me, however, I'd say if you want a phone rather than a communication device, and have a good data plan, go for the Plus/Dual due to the size; if having GPS is more important or you have a poor data plan then look towards the Orbit 2/Cruise.